221423319318 has 16 divisors (see below), whose sum is σ = 443172038256. Its totient is φ = 73753539840.

The previous prime is 221423319307. The next prime is 221423319319. The reversal of 221423319318 is 813913324122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221423319319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13549471 + ... + 13565802.

It is an arithmetic number, because the mean of its divisors is an integer number (27698252391).

Almost surely, 2^221423319318 is an apocalyptic number.

221423319318 is an abundant number, since it is smaller than the sum of its proper divisors (221748718938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221423319318 is a wasteful number, since it uses less digits than its factorization.

221423319318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27116639.

The product of its digits is 62208, while the sum is 39.

The spelling of 221423319318 in words is "two hundred twenty-one billion, four hundred twenty-three million, three hundred nineteen thousand, three hundred eighteen".